A recent report from Business Korea says that Apple will discontinue the use of its Triple-Level Cell (TLC) NAND in the 128GB iPhone 6 Plus and the 64GB iPhone 6 as a number of users have complained about crashes and boot loops after the devices are rebooted.
Last week, there was a rumor that Apple might have a big recall problem with the 128GB iPhone 6 Plus which was affected by the crash and boot loop issue. Apple never confirmed this rumored recall and the company said that the issue affected just a minority of users. Apple further added that the problem was not a new; one that they were well aware of and has already existed even way back with iOS 6. At present, the only recourse affected iPhone owners can do is to exchange their malfunctioning unit with a new one from the Apple store. Still, engineers at the Cupertino firm are hard at work to find a solution to the problem and may be incorporated in iOS 8.1.1 when it is ready.
The culprit to the predicament was pinpointed to be IC Controller of the mentioned Triple-Level Cell (TLC) NAND storage used in the 128GB iPhone 6 Plus and the 64GB iPhone made by another Apple-owned company, Anobit, which the fruit firm acquired three years ago. Business Korea reported that Apple has decided to stop using the TLC NAND flash and will instead use the Multi-Level Cell (MLC) NAND for the new batch of iPhones. TLC NAND flash can store three bits of data in each cell making it three times more efficient as storage when compared to the Single-Level Cell (SLC) and one and half more than the MLC type which stores 2 bits of data per cell. The TLC NAND storage is also cheaper to produce than both SLC and MLC NAND – the reason why Apple used it in its new iPhones. TLC NAND flash is also slower when compared to their SLC and MLC NAND counterparts.
As of this writing, the Cupertino firm has not yet confirmed nor commented on the said report.